Magnesium Oxide Polymerization Catalyst from Japan
High-purity MgO powder serving as catalyst in polypropylene production. Classified in 3815.90.3000 for its wholly inorganic composition and role as reaction initiator.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Surface area specifications (>100m²/g) distinguish catalytic grade from refractory grade
• Include polymerization reaction data demonstrating accelerator function
• Antidumping duties may apply from certain origins; verify scope rulings